Audio on HDMI is not working on trackin-panda

[vishal]

Audio on HDMI is not working on tracking-panda with 3.1 kernel https://android-build.linaro.org/builds/~linaro-android/tracking-panda/#build=51.

[vishal (vishalbhoj)]

Audio works on line-out using plughw:0,0 device , but fails when tried on HDMI using plughw:1,0.

Here are the commands I used to verify audio on HDMI.

alsa_amixer cset name='DL1 Mixer Multimedia' 1
alsa_amixer cset name='DL1 Media Playback Volume' 118
alsa_amixer cset name='Sidetone Mixer Playback' 1
alsa_amixer cset name='SDT DL Volume' 120
alsa_amixer cset name='DL1 PDM Switch' 1
alsa_amixer cset name='Headset Left Playback' 'HS DAC'
alsa_amixer cset name='Headset Right Playback' 'HS DAC'
alsa_amixer cset name='Headset Playback Volume' 13

 alsa_aplay -Dplughw:1,0 -vvv init
Playing raw data 'init' : Unsigned 8 bit, Rate 8[ 1296.798492] asoc: can't set codec omap4-hdmi-audio-codec hw params
000 Hz, Mono
aplay: set_params:1117: Unable to install hw params:
ACCESS: RW_INTERLEAVED
FORMAT: U8
SUBFORMAT: STD
SAMPLE_BITS: 8
FRAME_BITS: 8
CHANNELS: 1
RATE: 8000
PERIOD_TIME: 125000
PERIOD_SIZE: 1000
PERIOD_BYTES: 1000
PERIODS: 6
BUFFER_TIME: 750000
BUFFER_SIZE: 6000
BUFFER_BYTES: 6000
TICK_TIME: 0

[warmcat (andy-warmcat)]

Big changes in HDMI code came in from mainline last week, I solved most of the issues around video but I guess something is still broken here.

[Jassi Brar (jassisinghbrar)]

Vishal, the amixer settings above affect only onboard audio, HDMI wouldn't see any difference.
Anyways, the attached patch should fix the HDMI Audio.

[Tony Mansson (tony-mansson)]

Vishal says: Audio may be working at the kernel level but Audio HAL layer is not enabled at the userspace level which is causing the problem presently. since the HAL implementation changed from alsa-lib based to tinyALSA based audio can not be enabled and this bug cannot be tested on ICS.

[Zach Pfeffer (pfefferz)]

I think this may be a good bug to hand to MM. I'll ask Tom and company if their interested in taking a look.

[warmcat (andy-warmcat)]

Hm tilt fixed our side of this a while back, seems remaining issue is android userland side only. Closing our bit.

[Tom Gall (tom-gall)]

Kurt,

  I'd like to think this bug is a none-issue, but please take a moment and validate it's not. Thanks.